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Notice the brass fitting for the methanol injection plumbed into the air inlet tube. Right above the meth injection nozzle is a '99-'02 F-body IAT sensor. It was wisely placed after the meth nozzle to fool the computer into thinking it had much cooler IATs. Methanol cools the intake charge and combustion while adding 20 to 25 points of octane. Whenever the meth injection was activated the IAT was lowered to 45 degrees during dyno pulls.